Registration Dossier
Registration Dossier
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EC number: 268-074-9 | CAS number: 68002-61-9 This substance is identified by SDA Substance Name: C16-C18 and C18 unsaturated alkyl trimethyl ammonium chloride and SDA Reporting Number: 11-045-00.
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 15 June 2012
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: DIN 53914 Determining the surface tension of surfactants
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: ISO Standard 304-1985
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- ring method
- Key result
- Surface tension:
- 33 mN/m
- Temp.:
- 25 °C
- Conc.:
- 1 g/L
- Remarks on result:
- other: The critical micelle concentration (CMC) was found to be 0.14 g/L at pH 7.0 and 25°C.
- Conclusions:
- Under the study conditions, the surface tension of the1 g/L solution of the test substance at 25°C was found to be 33 mN/m and the critical micelle concentration was found to be 0.14 g/L at pH 7.0.
- Executive summary:
The surface tension of the test substance, TMAC T (purity not specified) was determined using ring method according to DIN 53914 and ISO 340:1985. Critical micelle concentration was determined using an automated tensiometer (KSV Tensiometer Sigma 70) connected with a computer. The water used was distilled and deionised using a MilliQ® plus purifier from Millipore. The tensiometer was calibrated with distilled water (surface tension value (mAV) at 25°C = > 72 mN/m). Under the study conditions, the surface tension of the1 g/L solution of the test substance at 25°C was found to be 33 mN/m and the critical micelle concentration was found to be 0.14 g/L at pH 7.0 (Borjesson, 2012).
Reference
Description of key information
The surface tension of the test substance was determined using ring method according to DIN 53914 and ISO 340:1985 (Börjesson J, 2012).
Key value for chemical safety assessment
- Surface tension:
- 33
- in mN/m at 20°C and concentration in mg/L:
- 1 000
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